batgrbproduct Analysis for Trigger=298308

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Sat Dec 15 02:57:14 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger298308/GCN5_download_cron
======================================================================

  Trigger: 00298308      Segment: 000

  BAT Trigger Time: 218809696.512   [s; MET]
      Trigger Stop: 218809723.392   [s; MET]
               UTC: 2007-12-08T12:28:14.095660    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 266.111921626781   Dec: 7.53488520006235  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.51
     Image Trigger?:     NO
     Rate S/N Ratio:     32.5883414736007  [ if not an image trigger ]
     Image S/N Ratio:    6.51

  Flight Position:   [ source = BAT ]
    RA: 266.111921626781   Dec: 7.53488520006235  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 266.103776975389   Dec: 7.45164288876137  [deg; J2000]  
        { 17h 44m 24.9s , +07d 27' 05.9" }
         +/- 4.39585070584772 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.73812380966009 [arcmin] (formal 1-sigma fit error)
    SNR: 3.66847544738833
    RA  =  17h 44m 24.9s  (266.103777 deg.)
    Dec =   7d 27'  6" (7.451643 deg.)
 
  Angular difference between Flight and Ground position is 5.017984 arcmin
 
  Partial Coding Fraction: 0.578125    [ including projection effects ]

  Duration
     T90: 26.8799999952316 +/- 
        Measured from: 0
                   to: 26.8799999952316     [s; relative to TRIGTIME]
     T50: 26.8799999952316 +/- 
        Measured from: 0
                   to: 26.8799999952316     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 26.8799999952316 second)
        Measured from: 0     
                   to: 26.8799999952316     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 26.8799999952316     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    -0.000585   0.034887   0.077557   0.171612
           0.036414   0.037728   0.036364   0.037722 [error]
 Peak     -0.000585   0.034887   0.077557   0.171612
           0.036414   0.037728   0.036364   0.037722 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
=== Fluence/Peak Flux Summary ===
 
              Model    Band1    Band2    Band3    Band4    Band5    Total      
                       15-25    25-50   50-100  100-350   15-150   15-350   keV
Fluence   Power-law 2.77e-09 1.30e-08 5.21e-08 7.82e-07 1.55e-07 9.71e-07   erg/cm2
              Error 7.71e-09 1.74e-08 4.32e-08 1.76e-06 1.24e-07 0.00e+00   erg/cm2
Peak flux Power-law 3.22e-03 8.06e-03 1.61e-02 8.07e-02 4.35e-02 1.08e-01   ph/cm2/s
              Error 9.21e-03 1.12e-02 1.35e-02 1.50e-01 3.88e-02 1.44e-01   ph/cm2/s
 
Fluence   Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
Fluence        Band 2.46e-09 1.26e-08 5.30e-08 6.76e-07 1.55e-07 7.41e-07   erg/cm2
              Error 7.62e-09 1.73e-08 5.51e-08 1.93e-06 9.55e-08 4.00e-06   erg/cm2
Peak flux      Band 3.21e-03 8.05e-03 1.61e-02 8.03e-02 4.35e-02 1.08e-01   ph/cm2/s
              Error 9.19e-03 1.12e-02 1.36e-02 1.58e-01 3.88e-02 2.19e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -0.000    2.239    -      -           3.23e-04 3.36e-04   50.419 57
CPL  -0.396    0.000     519.2    0.0      4.05e-04 0.00e+00   50.419 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -0.000    2.239    -      -           3.23e-04 3.36e-04   50.419 57
CPL  -0.396    0.000     519.2    0.0      4.05e-04 0.00e+00   50.419 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err   : 90% error of the photon index
Epeak      : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm       : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom
 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 7.552000 sec.
T50 in the 50-300 keV band: 3.712000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   26.880    0.000   26.880
T90    26.880    0.000   26.880
T50    26.880    0.000   26.880
Peak   26.880    0.000   26.880

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  266.1038  +7.4516 0.0522   33.4 -136.0       0.2980     3.7  TRIG_00298308       
------------------------------------------
 
Foreground time interval of the image:
  0.000  26.880 (delta_t =  26.880 [sec])
Background time interval of the image:
-203.211 -48.512 (delta_t = 154.699 [sec])

Lightcurves

Notes:

1 s binning

From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval

64 ms binning

Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Spectra

Notes:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to   26.880 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.527446E-04     ( -2.99975   1.47829 )
Norm@50keV  : 3.226169E-04    ( -3.226170E-04   3.494989E-04) )
------------------------------------------------------------
 Chi-Squared =      50.41926     using    59 PHA bins.
 Reduced chi-squared =     0.8845484     for     57 degrees of freedom
 Null hypothesis probability = 0.719
 
Photon flux (15-150 keV)    in 26.88 sec: 4.354820E-02 ( -0.0435482  0.0340114 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54717e-07 ( -1.54717e-07  9.34946e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   26.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.395924     (     )
Epeak [keV] : 519.180      (   )
Norm@50keV  : 4.047883E-04    (     )
------------------------------------------------------------
 Chi-Squared =      50.41925     using    59 PHA bins.
 Reduced chi-squared =     0.9003438     for     56 degrees of freedom
 Null hypothesis probability = 0.685
 
Photon flux (15-150 keV)    in 26.88 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   26.880 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.776344   ( -9.22366   5.77634 )
beta        : -4.129868E-03    ( -1.47424   10.0041 )
Epeak [keV] : 17.7268      ( -17.6268 9982.27 )
Norm@50keV   : 4.526649E-04    ( -4.526649E-04   528.483 )
------------------------------------------------------------
 Chi-Squared =      50.41934     using    59 PHA bins.
 Reduced chi-squared =     0.9167153     for     55 degrees of freedom
 Null hypothesis probability = 0.650
 
Photon flux (15-150 keV)    in 26.88 sec: 4.354693E-02 ( -0.0435469  0.0339668 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.55485e-07 ( -9.42088e-08  9.67906e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to   26.880 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.527446E-04     ( -2.99975   1.47829 )
Norm@50keV  : 3.226169E-04    ( -3.226170E-04   3.494989E-04) )
------------------------------------------------------------
 Chi-Squared =      50.41926     using    59 PHA bins.
 Reduced chi-squared =     0.8845484     for     57 degrees of freedom
 Null hypothesis probability = 0.719
 
Photon flux (15-150 keV)    in 26.88 sec: 4.354820E-02 ( -0.0435482  0.0340114 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54717e-07 ( -1.54717e-07  9.34946e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   26.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.395924     (     )
Epeak [keV] : 519.180      (   )
Norm@50keV  : 4.047883E-04    (     )
------------------------------------------------------------
 Chi-Squared =      50.41925     using    59 PHA bins.
 Reduced chi-squared =     0.9003438     for     56 degrees of freedom
 Null hypothesis probability = 0.685
 
Photon flux (15-150 keV)    in 26.88 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   26.880 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.776344   ( -9.22366   5.77634 )
beta        : -4.129868E-03    ( -1.47424   10.0041 )
Epeak [keV] : 17.7268      ( -17.6268 9982.27 )
Norm@50keV   : 4.526649E-04    ( -4.526649E-04   528.483 )
------------------------------------------------------------
 Chi-Squared =      50.41934     using    59 PHA bins.
 Reduced chi-squared =     0.9167153     for     55 degrees of freedom
 Null hypothesis probability = 0.650
 
Photon flux (15-150 keV)    in 26.88 sec: 4.354693E-02 ( -0.0435469  0.0339668 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.55485e-07 ( -9.42088e-08  9.67906e-08 ) ergs/cm2
 
Plot creation:
Sat Dec 15 03:16:11 EST 2007